They have also arrested people having epileptic seizures
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
PS - not to say it never happens for real. Please consider this - with fewer cops, crime goes up. That is factual. Anyone who thinks citizen/vigilante justice will work doesn’t know history or human nature. What will happen next is whoever has the most firepower and vicious attitude will soon rule. The inevitable result is modern day version of robber baron fiefdoms.
With more armed citizens, you won't need as many police, because people would understand that it's not worth it to rob a store, as someone working and/or a patron may be armed.